Tourbillon movement for timepiece

Abstract

A movement for a timepiece, that includes: a housing ( 10, 12 ); an energy source; a gear driven by the energy source ( 14 ); a frame ( 26 ) for a tourbillon ( 18 ) rotatingly mounted on the housing ( 10, 12 ) about a first axis (AA) and driven by the gear ( 14 ); a balance ( 32 ) mounted so as to oscillate in bearings on the frame ( 26 ); and an escapement ( 16, 34 ) including a fixed wheel ( 16 ) and a control member ( 34 ) interacting with the balance ( 32 ), the fixed wheel ( 16 ) sustaining the balance ( 32 ). In this movement, the bearings are arranged so that the balance ( 32 ) oscillates about a second axis (BB) inclined relative to the first axis (AA).

1. A timepiece movement comprising:
 a frame, 
 an energy source, 
 a train driven by the energy source, 
 a tourbillon cage mounted rotatingly on the frame around a first axis (AA) and driven by said train, 
 a balance mounted oscillating on the cage in bearings, said bearings being arranged such that said balance oscillates around a second axis (BB) which is inclined in relation to the first axis (AA), and 
 an escapement, said escapement comprising a fixed escape-wheel mounted fixed on the frame and a control organ cooperating with the balance and the fixed escape-wheel in order to sustain the balance. 
 
     
     
       2. The movement according to  claim 1 , wherein the incline angle between the two axes is between 15° and 50°. 
     
     
       3. The movement according to  claim 1 , wherein the escapement is of the lever type. 
     
     
       4. The movement according to  claim 1 , wherein the fixed escape-wheel is of the exterior toothing type. 
     
     
       5. The movement according to  claim 3 , wherein the fixed escape-wheel is of the exterior toothing type. 
     
     
       6. The movement according to  claim 1 , wherein the cage of said tourbillon turns on two bearings arranged at ends of the cage. 
     
     
       7. A timepiece movement comprising:
 a frame; 
 an energy source; 
 a train driven by the energy source; 
 a first tourbillon cage mounted rotatingly on the frame and driven by said train; 
 a second tourbillon cage mounted pivoting on said first tourbillon cage around a first axis; 
 a balance mounted oscillating on the second tourbillon cage in bearings, said bearings being arranged such that said balance oscillates around a second axis which is inclined in relation to the first axis; and 
 an escapement, said escapement comprising a fixed escape-wheel mounted fixed on the first tourbillon cage and a control organ cooperating with the balance and the fixed escape-wheel in order to sustain the balance. 
 
     
     
       8. The movement according to  claim 7 , wherein the incline angle between the two axes is between 15° and 50°. 
     
     
       9. The movement according to  claim 7 , wherein the escapement is of the lever type. 
     
     
       10. The movement according to  claim 7 , wherein the fixed escape-wheel is of the exterior toothing type. 
     
     
       11. The movement according to  claim 7 , wherein said first tourbillon cage turns on two bearings arranged at ends of the first tourbillion cage.